Richey's guide and assistant for carpenters and mechanics : a work of practical information, giving almost every geometrical and practical problem likely to arise in the work of the carpenter, and quick and easy methods for their solution : the use of the steel square, etc., tables showing strength and weight of materials, methods of framing, useful recipes, etc., etc. (1894)
Richey, H. G. (Harry Grant), b. 1868 · New York : W.T. Comstock · leaf 63
the centres for the semi-circles, and from any of these points to the given circle isthe radius, as 4 d. 68—To Divide a Circle into Concentric RingsHaving Equal Areas.—Divide the radius, a c, Fig. 72,into as many parts as areas required, as i, 2, 3, etc. With^ ^ as a diameter draw the semi-circle ^… … Fjg.rs rig,r4 69—To Draw any Number of Tangential Arcs ofCircles Having a Given Diameter.—Draw a polygonof as many sides as arcs required (four and six). Witheach anofle as centre and half of one side as radius drawthe arcs, as shown in Figs, j^, and 74. 70—To Divide the Circumference of a Circle…
Carpentry
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